After tracking a handgun found at a frat house brawl, 15 Division decides to go undercover at the club-land bar that's supplying the illegal handguns. During the undercover operation, Dov can't help but notice Chris's jumpy, nervous behavior - and when Chris goes to extreme lengths to ensure a specific drug dealer walks away without charge, Dov is left wondering just what exactly is going on with his friend. Meanwhile, Andy is devastated to learn that allegations made by her flamed-out rookie, Duncan, means she has to sit out the night's activities. Andy offers to help Sam with his missing person's case, which then takes a dark and unfortunate turn.

Despite a generous offer from Inspector John Jarvis, Oliver isn't interested in extending his contract as Acting Staff Sergeant. He's thrilled to be going back to the street. But Oliver's day takes a serious turn for the worse when his daughter Izzy shows up unannounced at the station, and when he learns Professional Standards is arriving early for Duncan's dismissal hearing. Oliver and Andy do some crash-course prep, but both are rendered speechless when Duncan presents incriminating new evidence against Andy. Cornered, Oliver finds himself making the exact kind of professional deal he never thought he would be capable of making.